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# 2nd step of the challenge

stuck

sets.py
```COURSES = {
"Python Basics": {"Python", "functions", "variables",
"booleans", "integers", "floats",
"arrays", "strings", "exceptions",
"conditions", "input", "loops"},
"Java Basics": {"Java", "strings", "variables",
"input", "exceptions", "integers",
"booleans", "loops"},
"PHP Basics": {"PHP", "variables", "conditions",
"integers", "floats", "strings",
"booleans", "HTML"},
"Ruby Basics": {"Ruby", "strings", "floats",
"integers", "conditions",
"functions", "input"}
}

def covers(argg):
courses_args = []
for name in set(COURSES.keys()):
if len(argg.intersection(COURSES[name])):
courses_args.append(name)
return courses_args

def covers_all(param):
lista = []
for k , v in COURSES.items():
if len(param.issubset(v)):
lista.append(k)
return lista
```

Here's a hint: What if you used a method like you did for the first task, but instead of testing that the intersection was not empty, tested to see if it was the same as the passed-in set?

Steven Parker didn't work lad :/

```def covers_all(param):
lista = []
for name in set(COURSES.keys()):
if len(param) == len(COURSES[name]):
lista.append(name)
return lista
```

That's not quite what I was hinting. In your other method, you used the intersection, and took the length of it. I was suggesting that you still do the intersection, but instead of taking the length of it, compare it directly to the argument set that was passed in to see if they are the same.

Steven Parker ahh man its not working :/ look at this way though why is it not working either

```def covers_all(param):
lista = []
for name in COURSES:
for item in COURSES[name]:
if param.issupset(item):
lista.append(name)
return lista
```

It doesn't look like you read my last message where I said, "I was suggesting that you still do the intersection, but instead of taking the length of it, compare it directly to the argument set that was passed in to see if they are the same."

Steven Parker I did read it Steven and I did try it , but I want to learn from my mistake

OK, just remember there will always be many ways to write something that won't work. I was just suggesting one approach you could take that would.

Happy coding!